The son of Dian Cecht, who was murdered by his father out of envy. When Nuada had his arm struck off in battle, Dian Cecht made a new one out of silver. Miach was skillful enough that he crafted Nuada a new arm of flesh. Envious of his son's skills, Dian Cecht killed Miach. At that point, 365 herbs sprung up on Miach's grave, and his sister Airmid seperated them to their properties. Again envious of her skill, Dian Cecht threw the herbs into the air so that none would know their properties.